International Letters of Natural Sciences最新文献_第10页

Evaluation of Genetic Diversity of Local-Colored Rice Landraces Using SSR Markers 利用SSR标记评价地方色稻地方品种遗传多样性

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-02-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.67.24

H. Hue, L. T. Nghia, Hoàng Tuyết Minh, L. Anh, L. Trang, T. Khanh

引用次数: 11

Growth and Rhizome Yield of Ginger (Zingiber officinale L.) as Influenced by Propagule Size and Nitrogen Levels in Ogbomoso, Southwestern Nigeria 繁殖体大小和氮水平对尼日利亚西南部Ogbomoso生姜生长和根产量的影响

IF 0.3

International Letters of Natural Sciences Pub Date : 2018-02-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.67.35

R. F. Asafa, W. Akanbi

{"title":"Growth and Rhizome Yield of Ginger (Zingiber officinale L.) as Influenced by Propagule Size and Nitrogen Levels in Ogbomoso, Southwestern Nigeria","authors":"R. F. Asafa, W. Akanbi","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.67.35","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.67.35","url":null,"abstract":"The experiments were conducted at the Teaching and Research Farm, Ladoke Akintola University of Technology, Ogbomoso, Nigeria in 2010 and 2011 to determine the effect of propagule size and nitrogen levels on the growth and rhizome yield of ginger. The nitrogen source was from Tithonia compost (TC). Three propagule sizes were tested (20, 30 and 40 g) and seven nitrogen levels (0, 40, 60, 80, 100, 120 and 140g kg N/ha). The experimental pots were laid out in a randomized complete block design with three replicates. Data were collected on growth parameters (plant height, number of leaves, leaf length and leaf width); rhizome yield components (number of tillers and rhizomes, and rhizome weight and length); and proximate composition (crude protein (CP), crude fibre (CF), total lipid (TL); Total Ash (TA), Starch and water soluble extract). Data collected were subjected to analysis of variance and significant means were compared using Duncan Multiple Range Test (DMRT) (P ≤ 0.05). Propagule size, N levels and their interactions significantly (P≤ 0.05) influenced most of the parameters assessed. In most cases, the use of 30 and 40 g planting material gave similar results. Plants nourished with 140 kg N/ha significantly and consistently outperformed others fertilized with other nitrogen levels. Crude protein obtained from 40 g propagule size was significantly ( P ≤ 0.05) higher than other tested propagule sizes. The rhizome yields of fertilized plants were significantly higher than the non fertilized plants. Rhizome yields ranged from 1.57 t/ha in none fertilized plants to 3.71 t/ha in 140 kg N/ha. In conclusion, establishment of ginger with 40 g planting materials and its nourishment with 140 kg N/ha enhanced its growth, rhizome yield and proximate compositions of the plant.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42412458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Identification of Bioactive Polyphenolic Compounds and Assessment of Antioxidant Activity of Origanum acutidens 牛耳草生物活性多酚类化合物的鉴定及抗氧化活性评价

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-11-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.66.1

Abdülmelik Aras, Muzaffer Silinsin, Muhammed Nuri Bingol, E. Bursal

引用次数: 22

Aspects of the Reproductive Biology of Black-Striped Pipefish Syngnathus abaster Risso, 1827 (Actinopterygii: Syngnathidae) in the Zaporizke Reservoir, Ukraine 乌克兰Zaporizke水库黑条纹管鱼Syngnathus abaster Risso, 1827的生殖生物学方面(放线鱼科:管鱼科)

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-11-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.66.9

O. Marenkov

{"title":"Aspects of the Reproductive Biology of Black-Striped Pipefish Syngnathus abaster Risso, 1827 (Actinopterygii: Syngnathidae) in the Zaporizke Reservoir, Ukraine","authors":"O. Marenkov","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.66.9","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.66.9","url":null,"abstract":"Black-striped pipefish Syngnathus abaster Risso, 1827 (Actinopterygii: Syngnathidae) has successfully spread in freshwater ecosystems of Ponto-Caspian basin. Monitoring studies show a steady increase in the number and biomass of pipefish in waters of Dnipro region. It is highly adaptable and breeds in a fresh water. This fact indicates the physiological plasticity of the reproductive system and ability to adapt to new environmental conditions. In the Zaporizke Reservoir pipefish spawns at a temperature of 18.0–22.0°C in the coastal area of the reservoir. Pipefish with a body length of 8.9 to 12.5 cm had gonads with weight of about 0.13 g, and the number of eggs ranged from 26 to 68. The maximum fertility had female 155 mm long and it reached 69 eggs. Size of eggs reached about 1.2±0.05 mm. The histological analysis of the gonads of pipefish and research of histometric measurements of eggs of fish at various stages of development was first conducted. In the period before pipefish spawning, there were eggs in different stages of maturity in the ovaries: oocyte in the phase of primary follicle «С», oocyte in the phase of vacuolation «D3», oocyte in the phase of trophoplasmatic growth «Е», beginning phase of mature follicle «F». Research of pipefish reproduction has important theoretical and practical significance for resolving issues with the spread of this species and its adaptation to new conditions.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42125734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the Effect of Planting Distance and Harvesting Time on the Carotenoids and Phytochemicals of Selected Orange-Fleshed Sweet Potato Varieties 种植距离和收获时间对橙肉甘薯品种类胡萝卜素和植物化学物质影响的评价

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-11-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.66.17

Obianuju Orimma Kalu, P. Ojimelukwe, A. Ukom

{"title":"Evaluation of the Effect of Planting Distance and Harvesting Time on the Carotenoids and Phytochemicals of Selected Orange-Fleshed Sweet Potato Varieties","authors":"Obianuju Orimma Kalu, P. Ojimelukwe, A. Ukom","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.66.17","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.66.17","url":null,"abstract":"We evaluated the carotenoid profile and concentration (by HPLC) and the phytochemical content of two OFSP varieties (Umuspo 3 and Ex-Igbariam) planted at three distances (20 cm, 30 cm and 40 cm) and harvested in two different periods (12th and 16th weeks after planting) respectively. Carotene contents of the outer peel and inner flesh of the sweet potato varieties were also determined. The results showed wide variation in the carotenoid and phytochemical content among the varieties at different planting spaces and harvest periods. Umuspo 3 planted at 20 cm, 30 cm and 40 cm had significantly greater carotenoid concentration than Ex-Igbariam variety. The predominant carotenoid was β-carotene with highest concentration obtained from 40 cm planting distance (92.82µg/g) and 30 cm (80.97µg/g) for Umuspo 3. Ex-Igbariam at 30 cm planting distance contained 2.51µg/g β-carotene when harvested after 16th weeks. Also the highest β-carotene concentration was from Umuspo 3 flesh sample planted 30 and 40 cm (409.45 and 441.15 mg/100g) and the peel for samples planted 30 and 40 cm (490.47 and 640.69 mg/100g, respectively) at the 12th week of harvest. Flavonoids were present in significant amounts (310.62mg/100g) in Umuspo 3 planted at 30 cm and harvested after 12th week while in total polyphenol, significant quantities of ≈42.12mg/100g was present in Ex-Igbariam spaced at 30 cm and 40 cm and harvested after 16th week. Provitamin A carotenoid was calculated and Umuspo 3 pro-vitamin A carotenoid was significantly higher (p< 0.05) with highest concentration (742.26 RE/100g) present in samples from 40 cm planting distance. The results showed that planting space and harvesting period had significant impact on the carotenoid and phytochemical concentrations of OFSP varieties. Planting distances of 30 and 40 cm are recommended for high carotenoid content in the two sweet potato varieties.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42658245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Effects of Photoperiods on the Growth Performance of Juvenile Trichogaster lalius (Hamilton, 1822) 光周期对毛仓鼠幼鱼生长性能的影响(Hamilton, 1822)

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-09-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.65.16

M. Awasthi, Pragya Gupta, F. Bano, M. Serajuddin

引用次数: 1

The Impact of Industrial Pollution on the Stem Anatomical Characteristics of Woody Plant Undergrowth in the City of Dnipro, Ukraine 工业污染对乌克兰第聂伯罗市木本植物茎解剖特征的影响

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-09-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.65.1

T. Iusypiva, G. Miasoid

引用次数: 2

Antimicrobial Activity of some Lactobacillus Species against Intestinal Pathogenic Bacteria 几种乳杆菌对肠道病原菌的抑菌活性研究

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-09-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.65.10

H. Tebyanian, A. Bakhtiari, A. Karami, A. Kariminik

引用次数: 10

Phenolic Compounds and Antioxidant Activity of Rice Straw Extract 稻草提取物中的酚类化合物及其抗氧化活性

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.64.1

A. Elzaawely, H. Maswada, M. El-sayed, M. Ahmed

{"title":"Phenolic Compounds and Antioxidant Activity of Rice Straw Extract","authors":"A. Elzaawely, H. Maswada, M. El-sayed, M. Ahmed","doi":"10.18052/WWW.SCIPRESS.COM/ILNS.64.1","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILNS.64.1","url":null,"abstract":"Agricultural wastes cause a serious environmental problem in Egypt. Utilization of these wastes by an environmentally friendly way is a very important issue. The objective of this study was to utilize rice straw into high-value products. Antioxidant activity, total soluble phenols, and flavonoids were evaluated in ethyl acetate extract prepared from rice straw after alkaline hydrolysis. Total phenols were found to be 221.6 mg gallic acid equivalents (GAE), while total flavonoids were 4.9 mg rutin equivalents (RE). The extract exhibited strong antioxidant activity measured by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method and its IC50 value was 0.4 mg/ml. Furthermore, the ethyl acetate extract possessed high antioxidant activity assayed by β-carotene bleaching method and its value of lipid peroxidation inhibition (LPI) was 75.4%. It also exhibited high reducing power and its IC50 value was equal to 0.06 mg/ml. HPLC analysis indicated that this extract contained seven phenolic acids including; protocatechuic, caffeic, syringic, p-coumaric, ferulic, rosmarinic and cinnamic, in addition to two flavonoids; qurecetin and kaempferol. Results indicated that ferulic and p-coumaric acids were the major soluble phenolic acids in rice straw, and their concentrations were 3.9 and 2.9 mg/g DW. It can be summarized that the strong antioxidant activity of ethyl acetate extract, prepared from rice straw, was highly correlated with its high level of phenolic compounds.","PeriodicalId":14407,"journal":{"name":"International Letters of Natural Sciences","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41637568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Physiochemical Properties of Cocoyam Starch Extracted in Two Media 两种培养基提取茯苓淀粉的理化性质

IF 0.3

International Letters of Natural Sciences Pub Date : 2017-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILNS.64.32

C. Ishiwu, I. Onoh, Peace Ogechi Nwanya, A. Agulanna

引用次数: 2